Give the Urethane-reaction mechanism for synthesis of flexible (03) Polyurethane foam.
[ marks]Write about the significance of surfactants for the production of PU foams. (04)
[ marks]Explain about waste management and environment regulation for solid PU (07) foam. waste.
[ marks]Mention various applications of slabstock foams. (03)
[ marks]List out the major groups and their sub groups for flexible slabstock foam (04) according to chemical structure.
[ marks]Describe the process operations and reaction zones for the production of (07) slabstock foams with schematic representation.
[ marks]List the basic requirements for manufacturing of PU buns. (03)
[ marks]Write about the effect of cell gas on Thermal conductivity of PU foam. (04)
[ marks]Explain in detail about continuous production of laminating PU rigid foam. (07)
[ marks]Give the advantages and disadvantages of Shell method for laminating (03) panels.
[ marks]Write about dependence of Thermal conductivity on density of rigid PU (04) foam.
[ marks]Mention the methods for manufacturing of pre-insulated pipes and explain (07) it in detail.
[ marks]List out the different types of Polyurethane. (03)
[ marks]Write a brief note about Polyol. (04)
[ marks]Discuss the Basic Structure of Polyurethane Elastomers with example and (07) explain prepolymer route for formation of Polyurethane Elastomers.
[ marks]List out the compounding ingredients used in the manufacturing of (03) Polyurethane.
[ marks]Draw the Structure of Urethane link and Polyurethane. (04)
[ marks]Discuss the basic chemistry of Polyurethane with suitable examples. (07)
[ marks]Give the difference between Hydrolysis and Hydrolytic stability. (03)
[ marks]List out the design guidelines used for Injection molded polyurethane parts. (04)
[ marks]Explain in detail about manufacturing of Diisocyanates with example. (07)1
[ marks]List out the different types of Physical Blowing agent used in Polyurethane (03) foam manufacturing process.
[ marks]Give the comparison of physical properties of water as a blowing agent and (04) boric acid as a blowing agent.
[ marks]Discuss in detail about Chain Extender used in Polyurethane manufacturing (07) process.
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